Arz can speak Russian and Spanish, and English. smokes, often fights with Killer Sans, has a giant lavender crystal the covers his left eye. He's sans the skeleton. He can Blast crystals out of his hands, can be very rough when stressed or angry. Has a wide smile, smirks and grins often. He's chill and tough. Doesn't often show a soft side. Shoots blasters when in battle. His crystal in his left eye gives him hallucinations, but he's used to it. His crystal also glows in the dark.